superinsulating = superinsulation, superinsulated, over-insulating, over-insulation, over-insulated = Making a building highly energy efficient for heating/cooling, to the point where little or no conventional heat/aircon is needed.

'Before' pictures. The external wall of two adjoining small bedrooms is being done at once, to allow reduction in thermal bridging at the partition wall as well as for materials efficiency. The smaller room is approx 226cm (w) by 231cm (d) by 233cm (h) and all its exterior wall should have a U-value of 0.3W/Km^2 or lower when this work is complete.